Railways digital system coming

Re: Railways digital system coming

Postby cartman » Sat Feb 01, 2014 8:38 am

The switch to digital is still two years away ... i asked the experts
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Re: Railways digital system coming

Postby Mike Alpha » Tue Feb 18, 2014 8:06 pm

cartman wrote:The switch to digital is still two years away ... i asked the experts


I notice these sites aren't showing up on ACMA. Will they ever, or is it just too early?

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Re: Railways digital system coming

Postby citabria » Thu Feb 20, 2014 10:12 am

Possibly they're covered by a spectrum license?
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Re: Railways digital system coming

Postby rustynswrail » Thu Feb 20, 2014 11:08 am

citabria wrote:Possibly they're covered by a spectrum license?



Correct.

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Re: Railways digital system coming

Postby Mike Alpha » Thu Oct 08, 2015 9:49 pm

I picked up a transmission on 418.550MHz near Yagoona railway station the other day. I think it was a railway comms operator asking a driver to look out for a reported hole in the fence near Belmore railway station and give him a sit-rep on the size of the hole etc.

There were signalling tones before and after each "over", but each conversation was one long full duplex transmission - no keying on or off - like a phone call.

ACMA shows that frequency appears at many railway station with complicated links to other frequencies at different sites.

What was I hearing and Is this what the digital rail comms system will replace?

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Re: Railways digital system coming

Postby cartman » Fri Oct 09, 2015 4:15 am

Sounds like the metronet - Signaller to Driver
Yes the GSM-R is replacing the Metronet
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Re: Railways digital system coming

Postby cartman » Fri Oct 16, 2015 12:51 pm

Found this

http://acma.gov.au/~/media/Spectrum%20L ... %20pdf.pdf

The implications seem to be:

Current = Analog 400Mhz Metronet
2016-2018 = Digital 1800Mhz GSM-R
Post 2018 = Digital 400Mhz TETRA
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Re: Railways digital system coming

Postby rustynswrail » Fri Oct 16, 2015 3:28 pm

cartman wrote:Found this
http://acma.gov.au/~/media/Spectrum%20L ... %20pdf.pdf
The implications seem to be:
Current = Analog 400Mhz Metronet
2016-2018 = Digital 1800Mhz GSM-R
Post 2018 = Digital 400Mhz TETRA


Assignments in the 460 MHz band have already be made employing a TETRA platform.

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Re: Railways digital system coming

Postby cartman » Fri Oct 16, 2015 5:07 pm

Well UGL have installed GSM-R in the existing tunnel but its not turned on yet, hence my observations.
Not whether it is feasible ... just a lot of $$$ being spent.
Three systems over 3-4 years for 13km of track
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Re: Railways digital system coming

Postby cartman » Fri Sep 16, 2016 8:33 pm

From a DTRS one page sheet handed out at the I & S Expo 2016 at the Australian Technology Park in August.

DTRS NETWORK
* 2 x fully diverse core main switching centres
* 266 base stations
* 98 dispatcher terminals
* 30 signal boxes
* 850 electric train cabs
* 77 NSW Trainlink diesels
* >1200 ICE freight and heritage
* Coverage throughout network and interfaces - Main lines, yards, depots, tunnels, other networks
* Platform for European train control system Level 2 (in-cab signalling), ATP and Asset data capability
* 2500 simultaneous calls. 5 second call establishment time.

DTRS running live on Tangara "T" sets and progressively being rolled out to other sets at various locations
Metronet still live but gradually being phased out as cabs migrate to DTRS
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